1dc0e8ba26be461bfc5c726fd1d9584ccb469e4a
[lttng-tools.git] / lttng-sessiond / ust-app.h
1 /*
2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; only version 2
7 * of the License.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17 */
18
19 #ifndef _LTT_UST_APP_H
20 #define _LTT_UST_APP_H
21
22 #include <stdint.h>
23 #include <urcu/list.h>
24
25 #include "trace-ust.h"
26
27 #define UST_APP_EVENT_LIST_SIZE 32
28
29 extern int ust_consumerd64_fd, ust_consumerd32_fd;
30
31 /*
32 * Application registration data structure.
33 */
34 struct ust_register_msg {
35 uint32_t major;
36 uint32_t minor;
37 pid_t pid;
38 pid_t ppid;
39 uid_t uid;
40 gid_t gid;
41 uint32_t bits_per_long;
42 char name[16];
43 };
44
45 /*
46 * Global applications HT used by the session daemon.
47 */
48 struct cds_lfht *ust_app_ht;
49
50 struct cds_lfht *ust_app_sock_key_map;
51
52 struct ust_app_key {
53 pid_t pid;
54 int sock;
55 struct cds_lfht_node node;
56 };
57
58 struct ust_app_ctx {
59 int handle;
60 struct lttng_ust_context ctx;
61 struct lttng_ust_object_data *obj;
62 struct cds_lfht_node node;
63 };
64
65 struct ust_app_event {
66 int enabled;
67 int handle;
68 struct lttng_ust_object_data *obj;
69 struct lttng_ust_event attr;
70 char name[LTTNG_UST_SYM_NAME_LEN];
71 struct cds_lfht *ctx;
72 struct cds_lfht_node node;
73 };
74
75 struct ust_app_channel {
76 int enabled;
77 int handle;
78 char name[LTTNG_UST_SYM_NAME_LEN];
79 struct lttng_ust_channel attr;
80 struct lttng_ust_object_data *obj;
81 struct ltt_ust_stream_list streams;
82 struct cds_lfht *ctx;
83 struct cds_lfht *events;
84 struct cds_lfht_node node;
85 };
86
87 struct ust_app_session {
88 int enabled;
89 /* started: has the session been in started state at any time ? */
90 int started; /* allows detection of start vs restart. */
91 int handle; /* Used has unique identifier */
92 unsigned int uid;
93 struct ltt_ust_metadata *metadata;
94 struct cds_lfht *channels; /* Registered channels */
95 struct cds_lfht_node node;
96 char path[PATH_MAX];
97 };
98
99 /*
100 * Registered traceable applications. Libust registers to the session daemon
101 * and a linked list is kept of all running traceable app.
102 */
103 struct ust_app {
104 pid_t ppid;
105 uid_t uid; /* User ID that owns the apps */
106 gid_t gid; /* Group ID that owns the apps */
107 int bits_per_long;
108 uint32_t v_major; /* Verion major number */
109 uint32_t v_minor; /* Verion minor number */
110 char name[17]; /* Process name (short) */
111 struct cds_lfht *sessions;
112 struct cds_lfht_node node;
113 struct ust_app_key key;
114 };
115
116 #ifdef HAVE_LIBLTTNG_UST_CTL
117
118 int ust_app_register(struct ust_register_msg *msg, int sock);
119 void ust_app_unregister(int sock);
120 unsigned long ust_app_list_count(void);
121 int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app);
122 int ust_app_stop_trace(struct ltt_ust_session *usess, struct ust_app *app);
123 int ust_app_start_trace_all(struct ltt_ust_session *usess);
124 int ust_app_stop_trace_all(struct ltt_ust_session *usess);
125 int ust_app_destroy_trace(struct ltt_ust_session *usess, struct ust_app *app);
126 int ust_app_destroy_trace_all(struct ltt_ust_session *usess);
127 int ust_app_list_events(struct lttng_event **events);
128 int ust_app_create_channel_glb(struct ltt_ust_session *usess,
129 struct ltt_ust_channel *uchan);
130 int ust_app_create_event_glb(struct ltt_ust_session *usess,
131 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
132 int ust_app_disable_channel_glb(struct ltt_ust_session *usess,
133 struct ltt_ust_channel *uchan);
134 int ust_app_enable_channel_glb(struct ltt_ust_session *usess,
135 struct ltt_ust_channel *uchan);
136 int ust_app_enable_event_glb(struct ltt_ust_session *usess,
137 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
138 int ust_app_disable_all_event_glb(struct ltt_ust_session *usess,
139 struct ltt_ust_channel *uchan);
140 int ust_app_enable_all_event_glb(struct ltt_ust_session *usess,
141 struct ltt_ust_channel *uchan);
142 int ust_app_disable_event_glb(struct ltt_ust_session *usess,
143 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
144 int ust_app_add_ctx_event_glb(struct ltt_ust_session *usess,
145 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
146 struct ltt_ust_context *uctx);
147 int ust_app_add_ctx_channel_glb(struct ltt_ust_session *usess,
148 struct ltt_ust_channel *uchan, struct ltt_ust_context *uctx);
149 void ust_app_global_update(struct ltt_ust_session *usess, int sock);
150
151 void ust_app_clean_list(void);
152 void ust_app_ht_alloc(void);
153 struct cds_lfht *ust_app_get_ht(void);
154 struct ust_app *ust_app_find_by_pid(pid_t pid);
155
156 #else /* HAVE_LIBLTTNG_UST_CTL */
157
158 static inline
159 int ust_app_destroy_trace_all(struct ltt_ust_session *usess)
160 {
161 return 0;
162 }
163 static inline
164 int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app)
165 {
166 return 0;
167 }
168 static inline
169 int ust_app_start_trace_all(struct ltt_ust_session *usess)
170 {
171 return 0;
172 }
173 static inline
174 int ust_app_stop_trace_all(struct ltt_ust_session *usess)
175 {
176 return 0;
177 }
178 static inline
179 int ust_app_list_events(struct lttng_event **events)
180 {
181 return 0;
182 }
183 static inline
184 int ust_app_register(struct ust_register_msg *msg, int sock)
185 {
186 return -ENOSYS;
187 }
188 static inline
189 void ust_app_unregister(int sock)
190 {
191 }
192 static inline
193 unsigned int ust_app_list_count(void)
194 {
195 return 0;
196 }
197 static inline
198 void ust_app_lock_list(void)
199 {
200 }
201 static inline
202 void ust_app_unlock_list(void)
203 {
204 }
205 static inline
206 void ust_app_clean_list(void)
207 {
208 }
209 static inline
210 struct ust_app_list *ust_app_get_list(void)
211 {
212 return NULL;
213 }
214 static inline
215 struct ust_app *ust_app_get_by_pid(pid_t pid)
216 {
217 return NULL;
218 }
219 static inline
220 struct cds_lfht *ust_app_get_ht(void)
221 {
222 return NULL;
223 }
224 static inline
225 void ust_app_ht_alloc(void)
226 {}
227 static inline
228 void ust_app_global_update(struct ltt_ust_session *usess, int sock)
229 {}
230 static inline
231 int ust_app_disable_channel_glb(struct ltt_ust_session *usess,
232 struct ltt_ust_channel *uchan)
233 {
234 return 0;
235 }
236 static inline
237 int ust_app_enable_channel_glb(struct ltt_ust_session *usess,
238 struct ltt_ust_channel *uchan)
239 {
240 return 0;
241 }
242 static inline
243 int ust_app_create_channel_glb(struct ltt_ust_session *usess,
244 struct ltt_ust_channel *uchan)
245 {
246 return 0;
247 }
248 static inline
249 int ust_app_disable_all_event_glb(struct ltt_ust_session *usess,
250 struct ltt_ust_channel *uchan)
251 {
252 return 0;
253 }
254 static inline
255 int ust_app_enable_all_event_glb(struct ltt_ust_session *usess,
256 struct ltt_ust_channel *uchan)
257 {
258 return 0;
259 }
260 static inline
261 int ust_app_create_event_glb(struct ltt_ust_session *usess,
262 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
263 {
264 return 0;
265 }
266 static inline
267 int ust_app_disable_event_glb(struct ltt_ust_session *usess,
268 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
269 {
270 return 0;
271 }
272 static inline
273 int ust_app_enable_event_glb(struct ltt_ust_session *usess,
274 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
275 {
276 return 0;
277 }
278 static inline
279 int ust_app_add_ctx_event_glb(struct ltt_ust_session *usess,
280 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
281 struct ltt_ust_context *uctx)
282 {
283 return 0;
284 }
285 static inline
286 int ust_app_add_ctx_channel_glb(struct ltt_ust_session *usess,
287 struct ltt_ust_channel *uchan, struct ltt_ust_context *uctx)
288 {
289 return 0;
290 }
291
292 #endif /* HAVE_LIBLTTNG_UST_CTL */
293
294 #endif /* _LTT_UST_APP_H */
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